Paper · 2001 · Universiti Putra Malaysia Institutional Repository (Universiti Putra Malaysia)

Effect of vacuum infusion of pectinase and calcium on the texture and colour of minimally processed guava (psidium guajava l.)

Azizah Osman; Muhamad Surairi S.; F. Liu; et al.

5
claims
10
verbatim quotes
0
citations
1
research areas
—
Not open access

Abstract

Guava (psidium guajava L.) ofcommercial maturity that was minimally processed were dipped in pectinase solutions at concentrations of 0, 0.5, 1.0 and 1.5% (volume/volume) under reduced pressure of76, 55, 35 and 20 cm Hg. The treated fruit wedges were then dipped in calcium lactate solution at concentrations of0, 0.5, 1.0, 1.5 and 2.0% (w/v). All samples were then stored for 7 days at 7+l°C; 75-92% RH. Fruits that were not treated with pectinase and calcium lactate served as control. This experiment was aimed at determining the effect of using pectinases, calcium lactate and reduced pressure on retaining the texture and colour of minimally processed guava during storage. Fruits dipped in pectinase and under reduced pressure retained the firmness of the fruit wedges. It was observed that infusion with 1% pectinase gave a positive effect on physical changes. Reduced pressure of35 cm Hg was also found to be the optimum pressure. However, overall results obtained reveal that combination treatment of enzyme infusion at reduced pressure followed by calcium dipping caused the fruits to loose its firmness and colour during storage.

Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher.

The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.

Claims 5

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Pectinase dipping under reduced pressure retained guava wedge firmness.

Treatment
dipped in pectinase and under reduced pressuree0
Outcome
firmnesse0
Direction
retainede0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Psidium guajava
Psidium guajava · TaxonFuadsyazwan ( talk ) · Public domain · Wikimedia Commons ↗

Verbatim

e0

“Fruits dipped in pectinase and under reduced pressure retained the firmness of the fruit wedges.”

✓ located verbatim in the source · abstract, characters 679–775 · show in text ↑
t0

“guava”

✓ located verbatim in the source · title, characters 100–105 · show in text ↑
Observationobservedoriginal resultpositivemeasured

Claim · model-written summary

One percent pectinase had a positive effect on physical changes.

Treatment
infusion with 1% pectinasee0
Outcome
physical changese0
Direction
positive effecte0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Psidium guajava
Psidium guajava · TaxonFuadsyazwan ( talk ) · Public domain · Wikimedia Commons ↗

Verbatim

e0

“It was observed that infusion with 1% pectinase gave a positive effect on physical changes.”

✓ located verbatim in the source · abstract, characters 776–867 · show in text ↑
t0

“guava”

✓ located verbatim in the source · title, characters 100–105 · show in text ↑
Observationobservedoriginal resultpositivemeasured

Claim · model-written summary

A pressure of 35 cm Hg was optimal.

Treatment
Reduced pressure of35 cm Hge0
Outcome
optimum pressuree0
Direction
optimume0
Value
35 cm Hge0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Psidium guajava
Psidium guajava · TaxonFuadsyazwan ( talk ) · Public domain · Wikimedia Commons ↗

Verbatim

e0

“Reduced pressure of35 cm Hg was also found to be the optimum pressure.”

✓ located verbatim in the source · abstract, characters 868–938 · show in text ↑
t0

“guava”

✓ located verbatim in the source · title, characters 100–105 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Combined enzyme infusion, reduced pressure and calcium dipping caused firmness loss during storage.

Treatment
combination treatment of enzyme infusion at reduced pressure followed by calcium dippinge0
Outcome
firmnesse0
Direction
loosee0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Psidium guajava
Psidium guajava · TaxonFuadsyazwan ( talk ) · Public domain · Wikimedia Commons ↗

Verbatim

e0

“combination treatment of enzyme infusion at reduced pressure followed by calcium dipping caused the fruits to loose its firmness and colour during storage.”

✓ located verbatim in the source · abstract, characters 985–1140 · show in text ↑
t0

“guava”

✓ located verbatim in the source · title, characters 100–105 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Combined enzyme infusion, reduced pressure and calcium dipping caused colour loss during storage.

Treatment
combination treatment of enzyme infusion at reduced pressure followed by calcium dippinge0
Outcome
coloure0
Direction
loosee0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Psidium guajava
Psidium guajava · TaxonFuadsyazwan ( talk ) · Public domain · Wikimedia Commons ↗

Verbatim

e0

“combination treatment of enzyme infusion at reduced pressure followed by calcium dipping caused the fruits to loose its firmness and colour during storage.”

✓ located verbatim in the source · abstract, characters 985–1140 · show in text ↑
t0

“guava”

✓ located verbatim in the source · title, characters 100–105 · show in text ↑

calcium atom · quality: postharvest · Psidium guajava (guava)Results differ

11 papers: 9 positive, 2 negative or no effect

1 paper in the same direction as this paper · 9 in the opposite direction

  1. positive
  2. positive
  3. positive

7 papers more in this group

See all 11 papers →

application · quality: postharvest · Psidium guajava (guava)Positive and negative results

8 papers: 6 positive, 2 negative or no effect

1 paper in the same direction as this paper · 6 in the opposite direction

  1. positive
  2. positive
  3. positive

4 papers more in this group

See all 8 papers →

Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.